What would happen if it was the Xu Zhu of Chapter 50 who struck Sweeper Monk with the refined Dragon Palms which he and Xiao Feng worked on together? This is assuming full utilization of all his 100-150 years of pure Beiming energy in an all out strike, with much the same scenario as Xiao Feng striking Sweeper; ie, Sweeper does not block, and Xu Zhu hits Sweeper head on with full power.